#include <stdio.h>

int isEven = 0;

int isEven()
{
    int num;
    if(num % 2 == 0)
    {
        return 1;
    }
    else
    {
        return 0;
    }
}
int main()
{
    if(isEven())
    {
        printf("it is even");
    }
    else
    {
        printf("it is not even");
    }
}